<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
	<script>
		/* var s = 'test'
		var x = new String(s)
		x.len = 4
		console.log(x.len)
		console.log(s == x)
		console.log(s === x)
		console.log(typeof(s))
		console.log(typeof(x)) */
		
		/* var x = [1,2];
		console.log(x.valueOf());
		console.log(String(x));
		console.log(Number(x)); */
		
		/* var obj = {id : 'ddd'};
		console.log(obj.toString());
		console.log(obj.valueOf()); */
		
		var now = new Date();
		console.log(typeof(now + 1));
	</script>
</html>
